EP0757967B1 - Load control device - Google Patents

Load control device Download PDF

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Publication number
EP0757967B1
EP0757967B1 EP96250164A EP96250164A EP0757967B1 EP 0757967 B1 EP0757967 B1 EP 0757967B1 EP 96250164 A EP96250164 A EP 96250164A EP 96250164 A EP96250164 A EP 96250164A EP 0757967 B1 EP0757967 B1 EP 0757967B1
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EP
European Patent Office
Prior art keywords
monitoring device
load monitoring
load
basic body
deformation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP96250164A
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German (de)
French (fr)
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EP0757967A1 (en
Inventor
Frank-Dietrich Wolter
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RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
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RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/125—Chain-type slings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/18—Chains having special overall characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G15/00—Chain couplings, Shackles; Chain joints; Chain links; Chain bushes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/047—Specific indicating or recording arrangements, e.g. for remote indication, for indicating overload or underload
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/04—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands
    • G01L5/06—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands using mechanical means

Definitions

  • the invention relates to a mechanical load control device for tensile strands in particular designed as chains with a basic body that one to reach a limit load elastic and after exceeding the Limit load plastically deformable deformation part and two Has connection points, the distance from each other changes under load, as well as with a display organ, that in the event of deformation of the deformation part of the Base body under the action of spring force from an initial position to a position indicating a certain load in which it is transferred in the event that the indicated Load remains.
  • a load control device of the above type is off DE-A-37 39 100 is known.
  • the main body is integrated into a chain strand elliptical chain link formed on the one oval chain link is inserted, the clear width at undeformed elliptical chain link smaller than the outer width of the latter is. That deforms elliptical chain link, so its outer width decreases, and the oval chain link becomes one upon reaching one Overload of the chain strand corresponding limit value the outer width by a spring over the belly of the elliptical chain link in a the overload of the Chain strand signaling position pulled.
  • the known device is not fully capable satisfy as an elongation of the elliptical chain link by a certain amount only to a change the outer width of this chain link by one Fraction of the amount of elongation results. It is done with in other words a weakening of the measured variable with the proviso that tolerance-related deviations of the mated Chain links of the display accuracy of the known device set narrow limits.
  • the practical Use of the known device is not always the There is a guarantee that the longitudinal axes of the assembled Limbs are perpendicular to each other. A Skewing these axes to each other can be undesirable Clamps between the mated Lead members that also have a negative impact.
  • the known device is suitable not for displaying intermediate values.
  • the invention has for its object a robust and to create compact load control device in which the Elongation of the base body used directly for load display will, regardless of their comparatively high Display accuracy is inexpensive to manufacture.
  • This The task is with a generic load control device solved according to the invention in that the display member of at least one resilient or under the action of spring force standing swivel lever is formed, the Free end assigned at least one stop is, and that the detent stop the pivot lever at Reaching a predetermined degree of deformation of the deformation part of the base body releases.
  • the device according to the invention shows critical loads and the overloading of a train strand safely and clearly on. It allows the display of different degrees of exposure and provides the prerequisite for that by additional Measures to calibrate the facility facilitate. In all debit cases displayed an automatic reset of the debit advice prevented.
  • 1 is the base body of a first Load control device, the deformation part of two, a circular cross-section having a circular arc Sections 2 and 3 is formed under load change their shape so that their radius of curvature with increasing load increases.
  • an eyelet 4 facing Area of the base body 1 are on the inside Locking stops 5, 6 and 7 arranged against which the free Ends 8 and 9 of two pivot levers 10 and 11 by one so-called hinge spring 12 are pressed.
  • the swivel levers 10 and 11 each have two on part of them Length interconnected by a plate-shaped bridge 13 Cheeks 14 and 15.
  • FIGS. 3 and 4 corresponds largely the embodiment of FIGS. 1 and 2. Changed only the position of the swivel levers and the Shape, size and orientation of the eyelet 4.
  • the base body 1 is part of a vertebra
  • the second Part of the clevis 20 forms.
  • Fig. 7 are two modification options for the in 1 to 6 shown load control devices.
  • the left part is one with the free end 8 of the Swivel lever 10 interacting interchangeable stop 21 shown. If you provide this stop 21 with a screw pin, so by changing the Height of the detent stop 21 a calibration of the device possible.
  • a calibration also allows the im right part of Fig. 7 solution shown, in which the free End 9 of the pivot lever 11 with one of an adjusting screw counter stop 22 formed is provided.
  • the load control devices described are both high static and dynamic load capacity. They allow a quick, clear visual recognition of certain Loads, with the respective load display received remains. Due to the selected arrangement of the swivel levers are secured against damage. Using several, interacting with the swivel levers The user is signaled in good time for rest stops, that he goes to the limit of resilience.
  • Fig. 8 To the load control device after displaying the entry in a limit area upstream of the overload To be able to use it again immediately, are in Fig. 8 shown further modification to the free Ends of the pivot levers 10 and 11 inserts 23 arranged, which can tilt around axes 24, provided that they do not pass through Locking pins 25 are locked in their target position.
  • the Locking pins 25 are used for the purpose of returning the Swing lever from a position between the locking stops 6 and 21 removed, then implemented again become.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Control Devices (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Jib Cranes (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The device has a base body with a part which deforms elastically until a threshold load is reached, above which it deforms plastically. An indication element is displaced from an initial position into a load indication position under spring action when deformation occurs, and remains in the load indicating position if the load is removed. The indication device is at least one sprung pivot lever (10,11) or a pivot lever subjected to spring action. The free end (8,9) of the pivot lever has at least one associated latching stop (5,7). The latching stop releases the pivot lever when a defined degree of deformation of the deformation part (2,3) of the base body (1) is reached.

Description

Die Erfindung betrifft eine mechanische Lastkontrolleinrichtung für insbesondere als Ketten ausgebildete Zugstränge mit einem Grundkörper, der einen bis zum Erreichen einer Grenzlast elastisch und nach Überschreiten der Grenzlast plastisch verformbaren Deformationsteil und zwei Anschlußstellen aufweist, deren Abstand voneinander sich unter Lasteinwirkung ändert, sowie mit einem Anzeigeorgan, das im Falle einer Verformung des Deformationsteiles des Grundkörpers unter Federkrafteinwirkung aus einer Ausgangsposition in eine eine bestimmte Last anzeigende Position überführt wird, in der es bei Wegfall der angezeigten Last verbleibt.The invention relates to a mechanical load control device for tensile strands in particular designed as chains with a basic body that one to reach a limit load elastic and after exceeding the Limit load plastically deformable deformation part and two Has connection points, the distance from each other changes under load, as well as with a display organ, that in the event of deformation of the deformation part of the Base body under the action of spring force from an initial position to a position indicating a certain load in which it is transferred in the event that the indicated Load remains.

Eine Lastkontrolleinrichtung der vorstehenden Art ist aus der DE-A-37 39 100 bekannt. Bei der bekannten Vorrichtung wird der Grundkörper von einem in einen Kettenstrang integrierten elliptischen Kettenglied gebildet, auf das ein ovales Kettenglied gesteckt ist, dessen lichte Weite bei nicht deformiertem elliptischen Kettenglied kleiner als die äußere Breite des letzteren ist. Verformt sich das elliptische Kettenglied, so nimmt seine äußere Breite ab, und das ovale Kettenglied wird bei Erreichen eines einer Überlastung des Kettenstranges entsprechenden Grenzwertes der äußeren Breite durch eine Feder über den Bauch des elliptischen Kettengliedes in eine die Überbelastung des Kettenstranges signalisierende Position gezogen.A load control device of the above type is off DE-A-37 39 100 is known. In the known device the main body is integrated into a chain strand elliptical chain link formed on the one oval chain link is inserted, the clear width at undeformed elliptical chain link smaller than the outer width of the latter is. That deforms elliptical chain link, so its outer width decreases, and the oval chain link becomes one upon reaching one Overload of the chain strand corresponding limit value the outer width by a spring over the belly of the elliptical chain link in a the overload of the Chain strand signaling position pulled.

Die bekannte Vorrichtung vermag insofern nicht voll zu befriedigen, als eine Längung des elliptischen Kettengliedes um einen bestimmten Betrag lediglich zu einer Veränderung der äußeren Breite dieses Kettengliedes um einen Bruchteil des Betrages der Längung führt. Es erfolgt mit anderen Worten eine Meßgrößenabschwächung mit der Maßgabe, daß toleranzbedingte Abweichungen der zusammengesteckten Kettenglieder der Anzeigegenauigkeit der bekannten Einrichtung enge Grenzen setzen. Hinzu kommt, daß beim praktischen Einsatz der bekannten Einrichtung nicht immer die Gewähr dafür gegeben ist, daß die Längsachsen der zusammengesteckten Glieder senkrecht zueinander stehen. Eine Schräglage dieser Achsen zueinander aber kann zu unerwünschten Klemmerscheinungen zwischen den zusammengesteckten Gliedern führen, die sich ebenfalls nachteilig auswirken. Schließlich eignet sich die bekannte Einrichtung nicht zur Anzeige von Zwischenwerten.In this respect, the known device is not fully capable satisfy as an elongation of the elliptical chain link by a certain amount only to a change the outer width of this chain link by one Fraction of the amount of elongation results. It is done with in other words a weakening of the measured variable with the proviso that tolerance-related deviations of the mated Chain links of the display accuracy of the known device set narrow limits. In addition, the practical Use of the known device is not always the There is a guarantee that the longitudinal axes of the assembled Limbs are perpendicular to each other. A Skewing these axes to each other can be undesirable Clamps between the mated Lead members that also have a negative impact. Finally, the known device is suitable not for displaying intermediate values.

Der Erfindung liegt die Aufgabe zugrunde, eine robuste und kompakte Lastkontrolleinrichtung zu schaffen, bei der die Längung des Grundkörpers unmittelbar zur Lastanzeige genutzt wird, und die ungeachtet ihrer vergleichsweise hohen Anzeigegenauigkeit kostengünstig herstellbar ist. Diese Aufgabe wird bei einer gattungsgemäßen Lastkontrolleinrichtung erfindungsgemäß dadurch gelöst, daß das Anzeigeorgan von mindestens einem federnden oder unter Federkrafteinwirkung stehenden Schwenkhebel gebildet wird, dessen freiem Ende mindestens ein Rastanschlag zugeordnet ist, und daß der Rastanschlag den Schwenkhebel erst bei Erreichen eines vorgegebenen Deformationsgrades des Deformationsteiles des Grundkörpers freigibt.The invention has for its object a robust and to create compact load control device in which the Elongation of the base body used directly for load display will, regardless of their comparatively high Display accuracy is inexpensive to manufacture. This The task is with a generic load control device solved according to the invention in that the display member of at least one resilient or under the action of spring force standing swivel lever is formed, the Free end assigned at least one stop is, and that the detent stop the pivot lever at Reaching a predetermined degree of deformation of the deformation part of the base body releases.

Die erfindungsgemäße Einrichtung zeigt kritische Belastungen und die Überlastung eines Zugstranges sicher und deutlich an. Sie erlaubt eine Anzeige unterschiedlicher Belastungsgrade und bietet die Voraussetzung dafür, durch zusätzliche Maßnahmen eine Kalibrierung der Einrichtung zu erleichtern. In allen angezeigten Belastungsfällen wird eine selbsttätige Rückstellung der Belastungsanzeige verhindert.The device according to the invention shows critical loads and the overloading of a train strand safely and clearly on. It allows the display of different degrees of exposure and provides the prerequisite for that by additional Measures to calibrate the facility facilitate. In all debit cases displayed an automatic reset of the debit advice prevented.

Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus den Unteransprüchen und der nachstehenden Beschreibung mehrerer in der beigefügten Zeichnung dargestellter Ausführungsformen der Erfindung. Es zeigen:

  • Fig. 1 teilweise im Schnitt die Vorderansicht einer ersten Lastkontrolleinrichtung,
  • Fig. 2 einen Schnitt längs der Linie II-II in Fig. 1,
  • Fig. 3 die Vorderansicht einer geringfügig modifizierten zweiten Lastkontrolleinrichtung,
  • Fig. 4 einen Schnitt längs der Linie IV-IV in Fig. 3,
  • Fig. 5 eine als Wirbel ausgebildete Überlastkontrolleinrichtung,
  • Fig. 6 einen Schnitt längs der Linie VI-VI in Fig. 5,
  • Fig. 7 in vergrößertem Maßstab Kalibrierungsmöglichkeiten für Lastkontrolleinrichtungen gemäß den Fig. 1 bis 6 und
  • Fig. 8 eine Konstruktion, die eine einfache Rückstellung einer Belastungsanzeige ermöglicht.
    • Further details and features of the invention emerge from the subclaims and the following description of several embodiments of the invention illustrated in the accompanying drawing. Show it:
  • 1 is a partial sectional front view of a first load control device,
  • 2 shows a section along the line II-II in FIG. 1,
  • 3 shows the front view of a slightly modified second load control device,
  • 4 shows a section along the line IV-IV in FIG. 3,
  • 5 an overload control device designed as a vortex,
  • 6 shows a section along the line VI-VI in FIG. 5,
  • Fig. 7 on an enlarged scale calibration options for load control devices according to FIGS. 1 to 6 and
  • Fig. 8 shows a construction that allows easy reset of a debit advice.

    • In den Figuren 1 und 2 ist 1 der Grundkörper einer ersten Lastkontrolleinrichtung, dessen Deformationsteil von zwei, einen zylindrischen Querschnitt aufweisenden kreisbogenförmigen Abschnitten 2 und 3 gebildet wird, die unter Last ihre Form dergestalt ändern, daß ihr Krümmungsradius mit steigender Belastung zunimmt. Im einer Öse 4 zugewandten Bereich des Grundkörpers 1 sind an dessen Innenseite Rastanschläge 5, 6 und 7 angeordnet, gegen die die freien Enden 8 und 9 zweier Schwenkhebel 10 und 11 durch eine sogenannte Scharnierfeder 12 gedrückt werden. Die Schwenkhebel 10 und 11 weisen jeweils zwei auf einem Teil ihrer Länge durch eine plattenförmige Brücke 13 miteinander verbundene Wangen 14 und 15 auf. Die über die Brücke 13 vorstehenden Enden der Wangen 14, 15 ragen in Taschen 16 an der den Rastanschlägen 5, 6, 7 gegenüberliegenden Seite des Grundkörpers 1 und sind hier auf einem Querstift 17 schwenkbar gelagert. Der Querstift 17 dient auch zur Halterung der Scharnierfeder 12. Zum zusätzlichen Schutz der im Innenraum des Grundkörpers 1 bereits weitgehend geschützt untergebrachten Schwenkhebel 10 und 11 dient eine Schutz- und Stütznase 18, die in den Ringraum 19 des Grundkörpers ragt.In Figures 1 and 2, 1 is the base body of a first Load control device, the deformation part of two, a circular cross-section having a circular arc Sections 2 and 3 is formed under load change their shape so that their radius of curvature with increasing load increases. In an eyelet 4 facing Area of the base body 1 are on the inside Locking stops 5, 6 and 7 arranged against which the free Ends 8 and 9 of two pivot levers 10 and 11 by one so-called hinge spring 12 are pressed. The swivel levers 10 and 11 each have two on part of them Length interconnected by a plate-shaped bridge 13 Cheeks 14 and 15. The above over the bridge 13 Ends of the cheeks 14, 15 protrude into pockets 16 the side opposite the detent stops 5, 6, 7 of the base body 1 and are here on a cross pin 17th pivoted. The cross pin 17 also serves for mounting the hinge spring 12. For additional protection of the already largely protected in the interior of the base body 1 housed pivot lever 10 and 11 is used Protection and support nose 18, which in the annular space 19 of the Basic body protrudes.

    Bei Verwendung der Lastkontrolleinrichtung im zulässigen Belastungsbereich nehmen die Schwenkhebel 10 und 11 die in Fig. 1 dargestellte Lage ein, d.h. ihre freien Enden 8 und 9 liegen gegen die Rastanschläge 5 bzw. 7 an. Sobald die Belastung eine aus Sicherheitsgründen vorgegebene Grenzlast überschreitet und es infolgedessen zu einer Vergrößerung des Abstandes zwischen den von der Öse 4 und einem Gabelkopf 20 gebildeten Anschlußstellen um einen bestimmten Betrag kommt, geben die Rastanschläge 5 und 7 die freien Enden 8 und 9 der Schwenkhebel 10 und 11 frei, und diese werden durch die Scharnier federn 12 gegen die sich gegenüberliegenden Flanken des Rastanschlages 6 gedrückt. Erst im Falle einer Überbelastung des jeweiligen Zugstranges, d.h. nach einer stärkeren Längung des Grundkörpers 1 klappen die Schwenkhebel 10 und 11 weiter zusammen, wobei sie zur Anlage gegen die Flanken der Schutz- und Stütznase 18 kommen. Dem Benutzer der Lastkontrolleinrichtung wird auf diese Weise unübersehbar signalisiert, daß er den überbelasteten Zugstrang ablegen muß. When using the load control device in the permissible Load range take the swivel levers 10 and 11 in Fig. 1 position, i.e. their free ends 8 and 9 are against the locking stops 5 and 7. As soon as the Load a limit load specified for safety reasons exceeds and as a result it increases the distance between those of the eyelet 4 and one Clevis 20 formed connection points around a certain Amount comes, the stops 5 and 7 give the free ends 8 and 9 of the pivot levers 10 and 11 free, and these will spring 12 against the hinge itself opposite flanks of the detent stop 6 pressed. Only in the event of an overload on the respective train, i.e. after a greater elongation of the base body 1 fold the swivel levers 10 and 11 further together, whereby them against the flanks of the protective and supporting nose 18 come. The user of the load control device clearly signaled in this way that he was the must put down the overloaded train.

    Die Ausführungsform gemäß den Fig. 3 und 4 entspricht weitgehend der Ausführungsform gemäß Fig. 1 und 2. Verändert wurden lediglich die Lage der Schwenkhebel und die Form, Größe und Orientierung der Öse 4.The embodiment according to FIGS. 3 and 4 corresponds largely the embodiment of FIGS. 1 and 2. Changed only the position of the swivel levers and the Shape, size and orientation of the eyelet 4.

    Im Falle der Ausführungsform gemäß den Fig. 5 und 6 formt der Grundkörper 1 einen Teil eines Wirbels, dessen zweiten Teil der Gabelkopf 20 bildet. Man erkennt, daß der Grundaufbau der beschriebenen Lastkontrolleinrichtung vielfache Variationen der Anschlußstellen zuläßt und insbesondere die Möglichkeit bietet, die Anschlußstellen im Rahmen sogenannter verwechslungsfreier Systeme als Lehren zu nutzen.In the case of the embodiment according to FIGS. 5 and 6 forms the base body 1 is part of a vertebra, the second Part of the clevis 20 forms. One recognizes that the basic structure the load control device described multiple Permits variations of the connection points and in particular offers the possibility of connecting points within the so-called confusion-free systems as lessons use.

    In Fig. 7 sind zwei Modifikationsmöglichkeiten für die in den Fig. 1 bis 6 gezeigten Lastkontrolleinrichtungen gezeigt. Im linken Teil ist ein mit dem freien Ende 8 des Schwenkhebels 10 zusammenwirkender austauschbarer Rastanschlag 21 dargestellt. Versieht man diesen Rastanschlag 21 mit einem Schraubzapfen, so ist durch eine Veränderung der Höhe des Rastanschlages 21 eine Kalibrierung der Einrichtung möglich. Eine Kalibrierung gestattet auch die im rechten Teil der Fig. 7 gezeigte Lösung, bei der das freie Ende 9 des Schwenkhebels 11 mit einem von einer Einstellschraube gebildeten Gegenanschlag 22 versehen ist.In Fig. 7 are two modification options for the in 1 to 6 shown load control devices. In the left part is one with the free end 8 of the Swivel lever 10 interacting interchangeable stop 21 shown. If you provide this stop 21 with a screw pin, so by changing the Height of the detent stop 21 a calibration of the device possible. A calibration also allows the im right part of Fig. 7 solution shown, in which the free End 9 of the pivot lever 11 with one of an adjusting screw counter stop 22 formed is provided.

    Die beschriebenen Lastkontrolleinrichtungen sind sowohl statisch als auch dynamisch hoch belastbar. Sie ermöglichen ein schnelles, eindeutiges optisches Erkennen bestimmter Belastungen, wobei die jeweilige Lastanzeige erhalten bleibt. Durch die gewählte Anordnung der Schwenkhebel sind diese gegen Beschädigungen gesichert. Bei Verwendung mehrerer, mit den Schwenkhebeln zusammenwirkender Rastanschläge wird dem Benutzer rechtzeitig signalisiert, daß er sich in Grenzbereiche der Belastbarkeit begibt. The load control devices described are both high static and dynamic load capacity. they allow a quick, clear visual recognition of certain Loads, with the respective load display received remains. Due to the selected arrangement of the swivel levers are secured against damage. Using several, interacting with the swivel levers The user is signaled in good time for rest stops, that he goes to the limit of resilience.

    Um die Lastkontrolleinrichtung nach der Anzeige des Eintritts in einen der Überlastung vorgeschalteten Grenzbereich umgehend wieder einsetzen zu können, sind bei der in Fig. 8 dargestellten weiteren Modifikation an den freien Enden der Schwenkhebel 10 und 11 Einsätze 23 angeordnet, die um Achsen 24 kippen können, sofern sie nicht durch Sicherungsstifte 25 in ihrer Sollage arretiert sind. Die Sicherungsstifte 25 werden zum Zwecke der Rückführung der Schwenkhebel aus einer Position zwischen den Rastanschlägen 6 und 21 entfernt, um anschließend wieder umgesetzt zu werden.To the load control device after displaying the entry in a limit area upstream of the overload To be able to use it again immediately, are in Fig. 8 shown further modification to the free Ends of the pivot levers 10 and 11 inserts 23 arranged, which can tilt around axes 24, provided that they do not pass through Locking pins 25 are locked in their target position. The Locking pins 25 are used for the purpose of returning the Swing lever from a position between the locking stops 6 and 21 removed, then implemented again become.

    Claims (19)

    1. A mechanical load monitoring device for tension lines designed especially as chains, with a basic body which has a deformation part (2,3), deformable elastically until a limit load is reached and plastically after the limit load is exceeded, and two connection points (4,20), the mutual spacing of which changes under a load effect, and with an indicator member (10,11) which, in the event of a deformation of the deformation part of the basic body, is transferred under the effect of spring force out of an initial position into a predetermined load indicating position, in which it remains during the cessation of the predetermined load, wherein the indicator member is formed by at least one pivoting lever (10,11) which is resilient or is under the effect of spring force and to the free end (8,9) of which is assigned at least one detent stop (5 or 7), respectively, and wherein the detent stop (5 or 7) releases the pivoting lever (10,11) only when a predetermined degree of deformation of the deformation part (2,3) of the basic body (1) is reached.
    2. The load monitoring device as claimed in claim 1, wherein it is equipped with two pivoting levers (10,11) movable in opposite directions.
    3. The load monitoring device as claimed in claim 1 or 2, wherein it has a plurality of detent stops (5,6; 7,6) assigned to different degrees of deformation.
    4. The load monitoring device as claimed in claim 2 or 3, wherein to one pivoting lever (10) are assigned detent stops (5,6) corresponding to degrees of deformation while to the other pivoting lever (11) are assigned detent stops (5,6) corresponding to further degrees of deformation which are different from the first degrees.
    5. The load monitoring device as claimed in one or more of claims 1 to 4, wherein the basic body (1) is of essentially annular design.
    6. The load monitoring device as claimed in claim 5, wherein the pivoting lever or pivoting levers (10,11) is or are arranged inside the deformation part (2,3) of the basic body (1).
    7. The load monitoring device as claimed in one or more of claims 1 to 6, wherein at least one detent stop (21) is connected releasably to the basic body (1).
    8. The load monitoring device as claimed in claim 7, wherein the releasable detent stop (21) is exchangeable and/or adjustable.
    9. The load monitoring device as claimed in one or more of claims 1 to 8, wherein a releasable counterstop (22) assigned to at least one detent stop (6,7) is arranged at the free end of at least one pivoting lever (11).
    10. The load monitoring device as claimed in claim 9, wherein the releasable counterstop (22) is exchangeable and/or adjustable.
    11. The load monitoring device as claimed in one or more of claims 1 to 10, wherein there are arranged at the free ends (8,9) of the pivoting levers (10,11) inserts (23) which can be transferred out of a monitoring position, in which they cooperate with a detent stop (5,7,21), into a return position, in which they can pass the detent stop (5,7,21).
    12. The load monitoring device as claimed in claim 11, wherein the inserts (23) can be retained in their monitoring position by retaining pins (25).
    13. The load monitoring device as claimed in claim 11 or 12, wherein the inserts (23) are mounted pivotably about pins (24) on the pivoting levers (10,11).
    14. The load monitoring device as claimed in one or more of claims 1 to 13, wherein at least one connection point of the basic body (1) is formed by a fork head (20).
    15. The load monitoring device as claimed in one or more of claims 1 to 14, wherein the basic body (1) forms part of a swivel.
    16. The load monitoring device as claimed in one or more of claims 1 to 15, wherein each pivoting lever (10,11) has two cheeks (14,15) which are connected to one another on part of their length via a plate-like bridge (13) and of which the ends protruding beyond the bridge (13) are connected to the basic body (1) by means of a crosspin (17).
    17. The load monitoring device as claimed in claim 16, wherein those ends of the cheeks (14,15) of the pivoting levers (10,11) which protrude beyond the bridge (13) are arranged in pockets (16) of the basic body (1).
    18. The load monitoring device as claimed in claim 16 or 17, wherein the crosspin (17) forms a bearing for a helically coiled hinge spring (12).
    19. The load monitoring device as claimed in one or more of claims 5 to 18, wherein a protective and supportive nose (18) for the pivoting lever or pivoting levers (10,11) projects into the interior of the deformation part (2,3) of the basic body (1).
    EP96250164A 1995-08-08 1996-07-31 Load control device Expired - Lifetime EP0757967B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19530687 1995-08-08
    DE19530687A DE19530687C2 (en) 1995-08-08 1995-08-08 Overload control device

    Publications (2)

    Publication Number Publication Date
    EP0757967A1 EP0757967A1 (en) 1997-02-12
    EP0757967B1 true EP0757967B1 (en) 2000-01-26

    Family

    ID=7769986

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP96250164A Expired - Lifetime EP0757967B1 (en) 1995-08-08 1996-07-31 Load control device

    Country Status (5)

    Country Link
    US (1) US5655476A (en)
    EP (1) EP0757967B1 (en)
    AT (1) ATE189180T1 (en)
    AU (1) AU704471B2 (en)
    DE (2) DE19530687C2 (en)

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    US7316169B2 (en) * 2002-06-14 2008-01-08 Peerless Chain Company Load bearing device including overload indicator
    US7032466B2 (en) 2002-06-14 2006-04-25 Peerless Chain Load bearing device including overboard indicator
    US7424996B2 (en) * 2006-11-29 2008-09-16 Stuart Larsen Wire rope pre-failure indicator and method of using same
    WO2013055992A1 (en) * 2011-10-12 2013-04-18 Saudi Arabian Oil Company Method for determining stress in flexible joints by use of leveling means
    US20130279298A1 (en) * 2012-04-19 2013-10-24 William Mark PRENTICE Monitoring of underwater mooring lines
    US11105444B2 (en) * 2015-02-26 2021-08-31 Steven A. Roth Frangible hanger assembly and method
    US9791357B2 (en) * 2015-07-28 2017-10-17 Jpw Industries Inc. Overload indicator for hoist
    US10328294B2 (en) * 2016-04-12 2019-06-25 Msa Technology, Llc Load indicator for a fall protection apparatus
    US10359328B1 (en) * 2017-02-16 2019-07-23 Barry Martin Schwaiger Tension gauge for bandsaw blades

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    Also Published As

    Publication number Publication date
    US5655476A (en) 1997-08-12
    DE19530687C2 (en) 1999-03-04
    DE19530687A1 (en) 1997-02-13
    AU6070696A (en) 1997-02-13
    DE59604274D1 (en) 2000-03-02
    ATE189180T1 (en) 2000-02-15
    EP0757967A1 (en) 1997-02-12
    AU704471B2 (en) 1999-04-22

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